Ski-Doo Formula S 1998, Shop Manual

Page: 109 / 338

Section 04 ENGINE
Subsection 04 (LEAK TEST AND ENGINE DIMENSION MEASUREMENT)
04-04-12
RECTIFYING SURFACES
Stick a fine sand paper sheet on the surface plate
then lightly oil the sand paper.
Rub manifold mating surface on sand paper using
8-figure movements.
Sand until mating surface is perfectly straight.
CHECKING CRANKSHAFT
ALIGNMENT
Install a degree wheel (P/N 414 3529 00) on crank-
shaft end.
Remove both spark plugs.
Install a TDC gauge (P/N 414 1047 00) in spark
plug hole on MAG side.
Bring MAG piston at top dead center.
Rotate degree wheel (not crankshaft) so that 360°
mark aligns with center of crankcase. Scribe a
mark on crankcase.
Remove TDC gauge and install it on PTO side.
Bring PTO piston to top dead center.
Interval between cylinders must be exactly 180°.
Any other reading indicates a misaligned (twisted)
crankshaft.
A00A1LA
0
90
80
70
60
50
40
30
20
10
180
0 A06C1TA